CHICAGO (CBS) — A Chicago woman, who was hurt in a Megabus accident near St. Louis earlier this month, is filing a lawsuit against the bus company.

Jamie Schultz claims the company failed to maintain and inspect the bus and its tires in order to ensure rider safety.

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The suit also blames the driver for the crash, which left one passenger dead and 47 hurt.

Illinois State Police said a blown tire appeared to have caused the bus to veer off the roadway, but that a full investigation could take weeks.

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The Megaebus was on its way to St. Louis to make a stop, when it crashed about 60 miles away from the city, near downstate Litchfield, Ill.

State police say more than 70 people were on board when the bus crashed into a concrete bridge support along Interstate 55.

The bus originated in Chicago and was ultimately headed to Kansas City.

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But in the past two years, Chicago Megabus has had seven crashes with at least four injuries and two fatalities.